@misc{indiciaeca8e7231caf7,
  title = {Syphilis: a difficult diagnosis?},
  author = {J Smoler and S L Pinto and G Vival and I Ortega},
  year = {1968},
  doi = {10.1288/00005537-196803000-00011},
  url = {https://pubmed.ncbi.nlm.nih.gov/5642495/},
  note = {Source identifier: 5642495}
}